function doShowContactForm() {
  var oContactDetails = document.getElementById("contactDetails");
  var oContactForm = document.getElementById("contactForm");
  oContactDetails.style.display = "none";
  oContactForm.style.display = "block";
};

function doShowContactDetails() {
  var oContactDetails = document.getElementById("contactDetails");
  var oContactForm = document.getElementById("contactForm");
  oContactForm.style.display = "none";
  oContactDetails.style.display = "block";
};